Please see the following article:
Connecting to the Public Share using macOS Big Sur 11.3.x may result in the following error when SMB connection are not supported:
There was a problem connecting to the server “MYCLOUD-XXXXXX”.
The server may not exist or it is unavailable at this time. Check the server name or IP address, check your network connection, and then try again.
In this case, please use the following Common Internet File System (cifs) connection:
cifs://guest:guest@MYCLOUD-XXXXXX/Public
- Where XXXXXX is the last 6 digits of the My Cloud Home serial number
cifs://guest:guest@/Public
